- Companies
- Plumbers and heating engineers
- Harlow
- Sontag & Sons Plumbing Ltd
Sontag & Sons Plumbing Ltd
- Company number
- 12784040
- Incorporated
- 31 Jul 20206 years trading
- Registered office
- 207 Felmongers, Harlow, CM20 3DW
- Nature of business
- Plumbing, heat and air-conditioning installation
Sontag & Sons Plumbing Ltd is a 6-year-old private limited company registered in Harlow, company number 12784040, one of 97 plumbing and heating companies in Harlow. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £101 (-21.3%) on the year before, to £374.
- Net assets rose in 1 of 4 year-on-year comparisons on record.
- Current assets of £8,801 against £18K owed within a year: 0.5 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2025 | £374 | £4,214 | £8,801 | £18K | 1 |
| 31 Jul 2024 | £475 | £5,652 | £6,757 | £18K | 1 |
| 31 Jul 2023 | £169 | £2,959 | £8,836 | £13K | 1 |
| 31 Jul 2022 | £248 | £5,176 | £9,058 | £12K | 1 |
| 31 Jul 2021 | £5,107 | £12K | £9,509 | 1 |
Where Sontag & Sons Plumbing Ltd is registered
The registered office is in Harlow (CM20), in the Harlow local authority area, East of England. Show CM20 3DW on a map.
Other trade companies in CM20
- Alpha Security, Auto Care and Facilities Maintenance LtdMechanics and garages
- VLD Partners LtdProperty developers
- Ata Pro LtdBuilders
- TLK Cons LtdSpecialist contractors
- Cavity Drain Pumps ( CDP ) LtdInstallers
- United Auto Solutions LtdMechanics and garages
- Ace Consolidate LimitedFinishing trades
- Wersatis & Global Parts LtdMotor traders
What happens if Sontag & Sons Plumbing Ltd files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 30 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 12784040
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 31 July 2020 (6 years ago)
- Registered office
- 207 Felmongers, Harlow, CM20 3DW
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 30 July 2026
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Harlow
Other active plumbing and heating companies registered in Harlow.
- Sterling Gas Limited2018
- STJ Mechanical Limited2017
- T. Patton Limited1982
- The Boiler Installation Specialists Ltd2008
- Tidehill Limited2002
- TT Fires Ltd2010
- Twin Plumbing and Ventilation Limited2020
- A & E Central Heating Services Ltd2023
All plumbing and heating companies in Harlow · All trades in Harlow · Plumbers and heating engineers across the UK
Frequently asked questions
When are Sontag & Sons Plumbing Ltd's accounts due?
Sontag & Sons Plumbing Ltd's next accounts are due at Companies House by 30 April 2027 (in 198 days), covering the period to 31 July 2026.
When is Sontag & Sons Plumbing Ltd's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Sontag & Sons Plumbing Ltd still trading?
Sontag & Sons Plumbing Ltd is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Sontag & Sons Plumbing Ltd do?
Sontag & Sons Plumbing Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Sontag & Sons Plumbing Ltd?
Sontag & Sons Plumbing Ltd was incorporated on 31 July 2020, 6 years ago.
What is the penalty if Sontag & Sons Plumbing Ltd files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Sontag & Sons Plumbing Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.